3i Infotech Papers: Sample Questions 489 - 490 of 1245

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Question number: 489

» Database » Oracle

True-False▾

Question

Is the Following Statement True or False?

The User can set Archive file name formats

Answer

TRUE

Explanation

Define archive log files

Define Archive Log Files

Define archive log files

  • Yes, the user can set archive file name formats.

  • LOG_ARCHIVE_FORMAT is applicable only to redo log in ARCHIVE mode.

  • Text string and variables can specify the default filename format when archiving redo log files.

  • String generate from format is appended to string specified from LOG_ARCHIVE_DEST parameter.

    What is Archiving?

  • Groups of redo log files are saved to offline destination, collectively the archived redo log, or archive log.

  • The process of turning redo log files into archived redo log files is archiving.

  • Only possible when database running in ARCHIVELOG mode.

  • Archived redo log contains a copy of every group enabled for archiving.

    Archived redo logs can:

  • Recover a database

  • Update a standby database

  • Get information about the history of a database using the log miner utility.

Question number: 490

» Basic CS » Networks

Essay Question▾

Describe in Detail

What are the possible ways of data exchange?

Explanation

Define parts of transmission modes

Define Parts of Transmission Modes

Define parts of transmission modes

Simplex:

  • Travels in only one direction.

  • Example- person talking into microphone and then hearing voice from the speaker.

  • Keyboard connected to CPU provides simplex communication- CPU never needs to send characters to the keyboard but the keyboard always send characters to the CPU.

Half-duplex:

  • Capable of sending signal in both directions- only one direction at a time.

  • Example- police car radio phones allowing one person to talk at a time but both sides can talk to one-another.

Full-duplex:

  • Data can be transmitted in both directions simultaneously.

  • A local area network has full-duplex transmission, one workstation can be sending data on the line while another workstation is receiving data.

  • Full-duplex transmission necessarily implies a bidirectional line.

  • Example- telephone IP service.

  • Also called bidirectional transmission.